Answer:
The lanthanides and actinides together are sometimes called the inner transition elements.
Explanation:
They are called this because they come up in the periodic table after actinium
Hope this helps :)
Answer:
Weigh less than 61.9 g
Explanation:
The symbol V represents the element Vanadium and He represents Helium.
Generally, 1 mol of any atom contains 6.022 * 10^23 atoms. This means we have to find the number of moles of each elements.
For V;
Number of moles = Mass / Molar mass = 61.9 / 50.94 = 1.215 mol
1 mol = 6.022 * 10^23 atoms
1.215 = x
Number of atoms = 6.022 * 10^23 * 1.215 =7.317 * 10^23
For He;
Since equal number of moles contain equal number of atoms;
Number of mol of He = 1.215 mol
Number of moles = Mass / Molar mass
Mass = Molar mass * Number of moles = 4 * 1.215 = 4.86 g
This means it would weigh less.
Answer:
The answer to your question is: c
Explanation:
A descomposition reaction is a chemical reaction in which the only one reactant yields two or more products.
a) HCl + NaHCO3 → H2O + CO2 + NaCl
This is not a descomposition reaction because there are two reactants not one, this option is incorrect.
b) 2Na + Cl2 → 2NaCl
THis option is also incorrect because there are two reactants in descompositin reaction there is only one reactant.
c) 2HgO → 2Hg + O2
There are only one reactant that yields 2 products, this is a descomposition reaction.
d) AgNO3 + NaCl → AgCl + NaNO3
THis is not a descomposition reaction because there are two reactants.
Is this an experiment? If so, if you have a small environment, compare it to a larger one, like your backyard for instance. Does the small environment have the same things as your backyard? Are they different? Compare them both like the backyard would have trees and with bird nests, and bushes, and all sorts of living organisms. More than your small environment would right? Your small environment gets the same nutrients as the large environment such as Carbon Dioxide, Sunlight, Water. Does your small environment have any animals or insects? You could use that as a comparison too.
I Hope This Helped!
Answer:
Electrons
Explanation:
"This free-floating collection of electrons gives metals many of their unique properties, and is sometimes called a “sea of electrons,”
Learn more about it at this website:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=2ahUKEwjUw9Sbl7nmAhWQKs0KHXFGCakQFjACegQICxAK&url=https%3A%2F%2Futexaslearn.instructure.com%2Fcourses%2F2010099%2Fpages%2Fexplain-i-metallic-bonding-and-properties-2&usg=AOvVaw3B0fp0MY7ut9ssl_ebAgP7